F. Varadi et al., SINGULARLY WEIGHTED SYMPLECTIC FORMS AND APPLICATIONS TO ASTEROID MOTION, Celestial mechanics & dynamical astronomy, 62(1), 1995, pp. 23-41
New techniques to study Hamiltonian systems with Hamiltonian forcing a
re proposed. They are based on singularly weighted symplectic forms an
d transformations which preserve these forms. Applications pertaining
to asteroid motion are outlined. These involve the presence of both Ju
piter and Saturn.